Re: [PATCH net-next 2/2] net: Drop NETDEV_UNREGISTER_FINAL

[Jason Gunthorpe <jgg@ziepe.ca>]

On Fri, Mar 23, 2018 at 12:39:33PM +0300, Kirill Tkhai wrote:
> Last user is gone after bdf5bd7f2132 "rds: tcp: remove
> register_netdevice_notifier infrastructure.", so we can
> remove this netdevice command. This allows to delete
> rtnl_lock() in netdev_run_todo(), which is hot path for
> net namespace unregistration.
> 
> dev_change_net_namespace() and netdev_wait_allrefs()
> have rcu_barrier() before NETDEV_UNREGISTER_FINAL call,
> and the source commits say they were introduced to
> delemit the call with NETDEV_UNREGISTER, but this patch
> leaves them on the places, since they require additional
> analysis, whether we need in them for something else.
> 
> Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
>  drivers/infiniband/hw/qedr/main.c |    4 ++--
>  include/linux/netdevice.h         |    1 -
>  include/rdma/ib_verbs.h           |    4 ++--
>  net/core/dev.c                    |    6 ------
>  4 files changed, 4 insertions(+), 11 deletions(-)

No problem to take the rdma part of this through netdev

Acked-by: Jason Gunthorpe <jgg@mellanox.com>

Jason